/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlineAchievementsInterface.h
Write the achievements provided to the server
void WriteAchievements ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & PlayerId, [FOnlineAchievementsWriteRef](API\Plugins\OnlineSubsystem\FOnlineAchievementsWriteRef) & WriteObject, const [FOnAchievementsWrittenDelegate](API\Plugins\OnlineSubsystem\Interfaces\FOnAchievementsWrittenDelegate) & Delegate )